The saturator, which is the most important part of the apparatus,
comprises a pump, a feed reservoir, and a sphere. The pump, which is of
bronze, is placed at the side of the column, at the lower part (Fig. 1).
This sucks up the gas stored in the gasometer and the water contained in
the reservoir, and forces them into the sphere. This latter is of
bronze, cast in a single piece, and the thickness of its sides prevents
all danger of explosion. It is silvered internally, and provided with a
powerful rotary agitator that favors the admixture of the water and gas.
[Illustration: FIG. 2.]
The apparatus it rendered complete by a bottling machine, which is
placed either on a line with the apparatus or in front of it. This
machine is connected directly with the sphere by a block-tin
pipe.--_Chronique Industrielle_.
* * * * *
APPARATUS FOR MEASURING THE FORCE OF EXPLOSIVES.
Among the numerous apparatus that have been devised for determining the
power of powder, those designed for military purposes are the ones most
extensively used. Up to the present, very few experimental apparatus
have been constructed for civil uses, although such are no less
necessary than the others. Mr. D'O. Guttman has examined the principal
types of dynamometers with respect to their use for testing explosive
materials, and, after ascertaining wherein they are defective, has
devised an apparatus in which the principle is the same as that employed
by Messrs.
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